In a video uploaded to YouTube recently, a research expert with the Mutual UFO Network (MUFON), Preston Dennett, presents evidence that purportedly proves there are underwater UFO bases distributed around the world. The documentary, however, gives special attention to an alleged massive underwater UFO base off the Southern California Coast.

Dennett, a MUFON Certified Field Investigator, presents details of the location of the alleged underwater UFO base and photographic evidence of its existence off the coast of Malibu in California.

Dennett’s field work, spanning three decades, makes him an expert in a special category of UFOs called Unidentified Submerged Objects (USOs). He is recognized widely as an authority in this field, having published articles in Fate Magazine, Atlantis Rising, Mysteries Magazine, UFO Magazine, and MUFON’s UFO journal.

He has also appeared on several radio and TV programs, including a documentary on the History Channel that focused on USOs, and has given several lectures across the country.

His interest in UFOs and related paranormal phenomena dates back to 1986 when some close relatives, friends, and colleagues at work in California reported strange encounters no one could explain. He began interviewing people and was shocked to discover that hundreds of people in his locality had also experienced strange UFO sightings and related paranormal phenomena.

After several media appearances, he began receiving reports from witnesses who had previously never spoken about their experiences. The massive feedback from readers and viewers led him to conduct even more extensive investigations. And after interviewing hundreds of new witnesses and accumulating an impressive mass of evidence he realized that the Southern California Coast was indisputably the most active area in the world for undersea UFO or USO activity.

Evidence from further investigations finally forced Dennett to conclude there was a major, massive underwater UFO or USO base around California’s Santa Catalina Channel. He presents the documented evidence, including eyewitness testimonies and photos, in the new YouTube video.

He also presents evidence of alleged government cover-up of information about the underwater UFO base.

After he began investigating UFOs in 1986, he met several witnesses who reported sighting UFOs flying out to sea and some flying towards the shore from the sea. A disproportionate number of the reports came from the California coastline, from Santa Barbara on the central California coast to Long Beach in Los Angeles County, Southern California. The region has, since the 1940s, acquired a reputation as a UFO hotspot, with hundreds of reports of sightings of UFOs flying over the ocean and USOs going underwater.

He also read reports by previous researchers and was surprised to learn that previous researchers had reported similar cases with one researcher noting that the coastline of Southern California and Santa Catalina Island registered the highest frequency of sightings since the 1940s.

Other researchers observed that sightings were so common along the Southern California Coast that by the 1960s, entire families would go down to the beach to see UFOs, and they were often not disappointed.

By the 1970s, tourists were visiting the beach at Point Dume at night to view multi-colored UFOs taking off and landing in the water.

A MUFON investigator noted that USOs were often sighted coming out of and entering water off the Palos Verdes Peninsula and the San Pedro Channel.

The frequency of the sightings suggested there was a single massive underwater UFO base or several smaller bases in waters off the coast of Southern California, specifically in the Santa Catalina Channel. The UFO researcher also suggested that the government was aware of it but was covering up the information out of fear of the potential social and political impact.

In the video uploaded to YouTube by the Mutual UFO Network (MUFON) on April 3, 2016, Dennett presents the evidence underlying his conclusions and evidence of government cover-up.

Allegations that there is a massive underwater UFO base off the coast of California, the so-called “Malibu anomaly” about six miles off the coast of Point Dume at Google Earth coordinates 34° 1’23.31″N 118° 59’45.64″W, have been around for several years.

The underwater anomaly off the coast of California, thought to be an alien UFO base, consists of a mysterious flat-topped structure (see YouTube below) supported by columns and pillars, believed to be entrance to the underground UFO or USO base.

According to Dennett, the June 14, 1992, sightings in Topanga Canyon, California, during which hundreds of independent witnesses reported observing hundreds of mysterious UFO crafts in the Santa Monica Mountains, appear to have triggered a massive wave of further reports that included sightings of strange metallic flying crafts, mysterious lights, USOs, abductions and reports of encounters with alien beings.

On a particularly busy day, more than 200 craft were seen in one night.

The sightings involved a wide range of people including beachgoers, surfers, fishermen, sailors, and military personnel. Many reported sighting squadrons of cigar-, orb-, and saucer-shaped UFOs performing complex maneuvers in broad daylight.

A particular case involved a crowd at Redondo Beach in Los Angeles County that reported sighting a large glowing UFO that landed on the water. And in the presence of the crowd, including a night watchman, lifeguard, and police officers, it sank into the water beneath the waves.

Other cases involved fishermen, sailors, and Navy personnel who reported that their boats were rammed or nearly rammed by mysterious USOs first mistaken for Russian submarines. But subsequent detailed description of the attacking crafts raised doubts. The witnesses often noticed the crafts moved at very high speed and lacked a wake and sound.

“The high speed, lack of wake and sound, and the huge swell make this object suspect.”

Some witnesses reported sighting aliens. One witness described the aliens as “strange-looking men” coming out of UFOs. They had yellowish-green skin, wore black leather pants, white belts, and light-colored jerseys.

During one encounter, the strange men walked up to the witness and appeared to ask questions in a language that the witness did not understand.